CN214378574U - Pole piece winding correction device and winding machine - Google Patents

Pole piece winding correction device and winding machine Download PDF

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Publication number
CN214378574U
CN214378574U CN202120678196.5U CN202120678196U CN214378574U CN 214378574 U CN214378574 U CN 214378574U CN 202120678196 U CN202120678196 U CN 202120678196U CN 214378574 U CN214378574 U CN 214378574U
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China
Prior art keywords
pole piece
winding
roller
embossing
correction device
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CN202120678196.5U
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Chinese (zh)
Inventor
阳如坤
邓哲
杨吉
陈飞
魏宏生
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Shenzhen Geesun Intelligent Technology Co Ltd
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Shenzhen Geesun Intelligent Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The embodiment of the utility model provides a pole piece is convoluteed and is corrected device and winder, relate to lithium ion battery and make technical field, pole piece is convoluteed and is corrected the device and include the mounting panel, the knurling roller set, middle roller set and winding mechanism of crossing, carry out the knurling action to the pole piece through the knurling roller set, and leave the indentation on the pole piece, make it increase frictional force when carrying to crossing the roller, make it difficult emergence slip in transportation process, pole piece tension keeps stable, send the stability of piece in-process greatly improved, the relative displacement who skids the production when also having avoided the coiling simultaneously. Meanwhile, the surface area and the interlayer distance of the pole piece are increased, so that the angle between the wound pole lug and the circle center of the winding needle is reduced, the pole lug is prevented from deviating to one direction, and the alignment degree is better. Compared with the prior art, the utility model provides a pole piece is convoluteed and is corrected device can avoid the pole piece to skid, improves the dislocation of the electric core utmost point ear after coiling, improves utmost point ear alignment precision, guarantees the quality of electric core.

Description

Pole piece winding correction device and winding machine
Technical Field
The utility model relates to a lithium ion battery makes the field, particularly, relates to a pole piece is convoluteed and is corrected device and winder.
Background
At present, in the production process of a power lithium battery, the alignment degree of a lug of a battery core directly influences the quality of a formed battery core, and in the prior art, a smooth surface structure is adopted for a roller to cause the phenomenon that a pole piece is easy to slip in the conveying process, so that the tension during winding and the alignment degree of winding forming are influenced. In addition, in the winding process, the mutual friction between the pole pieces is small, so that the slipping phenomenon is easy to occur, and the winding alignment degree is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pole piece is convoluteed and is corrected device and winder, it can prevent that the pole piece from skidding, improves the alignment degree of coiling, improves electric core quality, for example.
The embodiment of the utility model discloses a can realize like this:
in a first aspect, the utility model provides a pole piece is convoluteed and is corrected device, including mounting panel, knurling roller set, middle roller set and winding mechanism of crossing, the knurling roller set in the middle of cross the roller set with winding mechanism all sets up on the mounting panel, the knurling roller set is used for knurling the pole piece and moves, and leave the indentation on the pole piece, winding mechanism is used for coiling and has the indentation the pole piece, in the middle of cross the roller set setting in the knurling roller set with between the winding mechanism, be used for with through the knurling the pole piece is sent into winding mechanism.
In an alternative embodiment, the embossing roller set comprises an embossing roller and a glue roller which are oppositely arranged on the mounting plate, an embossing channel for a pole piece to pass through is formed between the embossing roller and the glue roller, and the outer peripheral surface of the embossing roller is provided with embossing teeth which are used for pressing the pole piece and leaving an impression on the pole piece.
In an alternative embodiment, the embossing teeth comprise a plurality of embossing lobes, each of which has a semicircular cross-section.
In an alternative embodiment, the plurality of embossing convex hulls are hemispherical bulges, the plurality of embossing convex hulls are uniformly distributed on the outer circumferential surface of the embossing roller, and the extending direction of each embossing convex hull is parallel to the axial direction of the embossing roller.
In optional implementation mode, winding mechanism includes that the head is rolled up and the reducing is rolled up the needle, it sets up to roll up the head on the mounting panel, the reducing is rolled up the needle and is rotationally set up on the head, just the reducing is rolled up the needle and is used for coiling the pole piece to can adjust according to pole piece alignment degree and roll up the diameter.
In an optional embodiment, the number of the reducing winding needles is two, and the two reducing winding needles are oppositely arranged on the winding head.
In an optional embodiment, the pole piece winding correction device further comprises a feeding roller group, and the feeding roller group is arranged on the mounting plate and located on the feeding side of the winding mechanism.
In an optional embodiment, the middle roller group comprises a first roller, a second roller, a third roller and a fourth roller, the first roller and the fourth roller are arranged along a first straight line direction, the second roller and the third roller are arranged along a second straight line direction, the first straight line direction and the second straight line direction are parallel to each other, the first roller and the second roller are respectively arranged on two sides of the pole piece, and the third roller and the fourth roller are respectively arranged on two sides of the pole piece.
In a second aspect, the present invention provides a winding machine, which comprises a sheet feeding mechanism and a pole piece winding correction device as in any one of the previous embodiments, wherein the sheet feeding mechanism is arranged on the mounting plate and used for feeding the embossing roller set.
The utility model discloses beneficial effect includes, for example:
the utility model provides a pole piece is convoluteed and is corrected device and coiler, through the in-process at carrying the pole piece add embossing roller set, carry out the knurling action to the pole piece through embossing roller set, and leave the indentation on the pole piece, because the existence of indentation, make it increase frictional force when carrying to the roller, make it difficult emergence slip in transportation process, pole piece tension remains stable, greatly improved the stability of sending the piece in-process, the frictional force increase between winding in-process pole piece simultaneously, the relative displacement who skids the production when also having avoided coiling. Meanwhile, the embossing roller set leaves an indentation on the pole piece, so that the surface area and the interlayer distance of the pole piece are increased, the angle between the wound pole lug and the circle center of the winding needle is reduced, the pole lug is prevented from deviating to one direction, and the alignment degree is better. Compared with the prior art, the utility model provides a pole piece is convoluteed and is corrected device can avoid the pole piece to skid, improves the dislocation of the electric core utmost point ear after coiling, improves utmost point ear alignment precision, guarantees the quality of electric core.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a pole piece winding correction device according to a first embodiment of the present invention;
FIG. 2 is a schematic view of the embossing roller set of FIG. 1;
FIG. 3 is a schematic structural view of the winding mechanism of FIG. 1;
fig. 4 is a schematic view of the structure of the intermediate set of rolls in fig. 1.
Icon: 100-pole piece winding correction device; 110-a mounting plate; 130-embossing roller set; 131-an embossing roll; 133-round rubber roller; 135-embossing teeth; 150-intermediate set of rollers; 151-first passing roller; 153-second pass roller; 155-third roller; 157-fourth passing roller; 170-a winding mechanism; 171-a winding head; 173-reducing winding needle; 190-feeding roller group.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
As disclosed in the background art, in the pole piece winding process of the existing pole piece winding machine, because the surface of the pole piece is in a smooth state, the friction force between the middle roller for conveying the pole piece and the pole piece is small, and the pole piece is easy to slip, so that the pole piece is subjected to relative displacement, and the alignment degree of a pole lug on the wound pole piece is influenced. In addition, when the pole pieces are wound on the winding head, the pole pieces may slip due to relative sliding. And because the pole piece is thin, the thickness of the laminated layers is small, and the angle between the wound two pole lugs and the circle center of the winding needle is large, the pole lugs are likely to be deviated to one direction during winding, and the alignment degree of the pole lugs is influenced.
For solving the problem, the utility model provides a novel pole piece is convoluteed and is corrected device, in electric core coiling forming technology, the embossing roller is favorable to improving the utmost point ear alignment degree of finally taking shape electric core, the pit that produces on the pole piece after the knurling, the arch has increased frictional force, the relative displacement that the pole piece skidded the production when convoluteing has been reduced, the interlamellar spacing that has increased naked electric core simultaneously makes two pole ears after the coiling and the angle of rolling up the needle centre of a circle diminish, so utmost point ear can not be partial to a direction, let the alignment degree better. The diameter of the winding needle can be adjusted in a small range by the reducing winding needle, so that the deviation of the tail position of the battery cell and the layer number of the battery cell, which is influenced by the change of the diameter size of the winding needle caused by machining errors, is eliminated. The embossing roller produces pit, arch on the cathode pole piece, and electric core position deviation when the coiling was adjusted to the needle was rolled up in the reducing has also increased the surface area when increasing the interval between the layer of naked electric core, has improved electric core quality. It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment
Referring to fig. 1 to 4, the present embodiment provides a pole piece winding correction device 100, which can prevent a pole piece from slipping, improve winding alignment, and improve cell quality.
The pole piece winding correction device 100 provided by the embodiment comprises a mounting plate 110, an embossing roller set 130, an intermediate roller set 150, a winding mechanism 170 and a feeding roller set 190, wherein the embossing roller set 130, the intermediate roller set 150 and the winding mechanism 170 are all arranged on the mounting plate 110, the embossing roller set 130 is used for embossing a pole piece and leaving an indentation on the pole piece, the winding mechanism 170 is used for winding the pole piece with the indentation, and the intermediate roller set 150 is arranged between the embossing roller set 130 and the winding mechanism 170 and is used for feeding the embossed pole piece into the winding mechanism 170. A feed roller set 190 is provided on the mounting plate 110 and is located on the feed side of the winding mechanism 170 for feeding pole pieces into the winding mechanism 170.
In this embodiment, the pole piece winding correction device 100 is suitable for a winding machine for winding a pole piece, wherein the pole piece is preferably a cathode pole piece, and the mounting plate 110 is fixed on a frame of the winding machine to perform fixing and supporting functions, and during actual operation, the cathode pole piece is sequentially conveyed to the embossing roller set 130, the middle roller set 150 and the winding mechanism 170, so as to realize embossing and winding actions, and other structures for unwinding and driving are not shown in this embodiment, and reference may be made to an existing winding machine.
It should be noted that, in this embodiment, the embossing roller set 130 leaves an indentation on the pole piece, where the indentation is specifically a concave structure on one side surface of the pole piece, and a protrusion is formed on the other side surface of the pole piece, so that the overall thickness of the pole piece is increased, the surface area and the interlayer distance of the pole piece are increased, the angle between the wound pole lug and the circle center of the winding needle is reduced, the pole lug is prevented from deviating to one direction, and the alignment degree is better. And, through leaving the indentation for the pole piece has increased frictional force when carrying to middle roller set 150, makes it be difficult for taking place to slide in transportation process, and pole piece tension keeps stable, has greatly improved the stability of sending the piece in-process, and the frictional force increase between the pole piece in the coiling process simultaneously has also avoided the relative displacement that skids when coiling and produces, is favorable to accurate coiling and the improvement of electric core quality.
In this embodiment, the embossing roller set 130 includes an embossing roller 131 and a glue roller 133 oppositely disposed on the mounting plate 110, an embossing channel for passing the pole piece is formed between the embossing roller 131 and the glue roller 133, an outer circumferential surface of the embossing roller 131 is provided with embossing teeth 135, and the embossing teeth 135 are used for pressing the pole piece and leaving an impression on the pole piece. Specifically, the embossing roller 131 is rotatably disposed on the mounting plate 110, and the outer peripheral surface of the glue roller 133 is of a conventional smooth surface structure and is pressed on the embossing roller 131, so that the pole piece is embossed by the embossing teeth 135 on the embossing roller 131, and one side surface of the pole piece is provided with a concave indentation and the other side surface is provided with a convex protrusion under the pressing action of the embossing teeth 135.
In this embodiment, the embossing roller 131 and the glue roller 133 are driven rollers, which are driven by the pole pieces to rotate.
In the present embodiment, the embossing teeth 135 include a plurality of embossing lobes, each of which has a semicircular cross-section. Specifically, the embossing convex hulls are uniformly distributed on the outer peripheral surface of the embossing roller 131, and the cross section of each embossing convex hull is semicircular, so that the shape of the indentation is also semicircular, and by adopting the semicircular embossing convex hulls, the stress of the embossing convex hulls and the pole piece is uniform in stress extrusion, the local stress concentration is avoided, and the damage to the surface of the pole piece caused by the embossing process can be avoided. Of course, the cross-sectional shape of the embossing convex hull here may also be arcuate or trapezoidal, etc., and is not limited here.
In this embodiment, the embossing protrusions are hemispherical protrusions and are uniformly distributed on the outer circumferential surface of the embossing roller 131.
The winding mechanism 170 includes a winding head 171 and a variable diameter winding needle 173, the winding head 171 is disposed on the mounting plate 110, the variable diameter winding needle 173 is rotatably disposed on the winding head 171, and the variable diameter winding needle 173 is used for winding the pole piece and can adjust the winding diameter according to the pole piece alignment. The specific reducing principle and structure of the reducing needle 173 can be referred to the existing reducing needle, and will not be described in detail here.
It should be noted that, in this embodiment, the time for changing the diameter of the diameter-changing winding needle 173 may be manually set, that is, the time for changing the diameter of the diameter-changing winding needle 173 is set to change the diameter according to the change in the diameter of the winding needle caused by the machining error, and the diameter of the diameter-changing winding needle 173 can be adjusted in a small range, so as to eliminate the deviation that the change in the diameter of the winding needle caused by the machining error affects the tail position of the battery cell and the number of battery cell layers.
In this embodiment, there are two reducing winding needles 173, and the two reducing winding needles 173 are oppositely disposed on the winding head 171. Specifically, by providing two reducing winding needles 173, one can be wound while the other is being blanked, greatly increasing the winding efficiency.
The middle roller group 150 comprises a first roller 151, a second roller 153, a third roller 155 and a fourth roller 157, the first roller 151 and the fourth roller 157 are arranged along a first straight line direction, the second roller 153 and the third roller 155 are arranged along a second straight line direction, the first straight line direction and the second straight line direction are parallel to each other, the first roller 151 and the second roller 153 are respectively arranged on two sides of a pole piece, and the third roller 155 and the fourth roller 157 are respectively arranged on two sides of the pole piece. Specifically, the first roller 151, the second roller 153, the third roller 155 and the fourth roller 157 are distributed in a trapezoidal shape, the pole piece sequentially rounds the first roller 151, the second roller 153, the third roller 155 and the fourth roller 157, the first roller 151 and the second roller 153 respectively roll and abut against two sides of the pole piece, the second roller 153 and the third roller 155 roll and abut against the same side of the pole piece, the third roller 155 and the fourth roller 157 respectively roll and abut against two sides of the pole piece, and the first roller 151, the second roller 153, the third roller 155 and the fourth roller 157 which are distributed in a trapezoidal shape are arranged, so that tension of the pole piece is guaranteed, and smooth winding of the pole piece is guaranteed.
In summary, according to the pole piece winding correction device 100 provided by this embodiment, the embossing teeth 135 are disposed on the outer peripheral surface of the embossing roller 131, and the embossing teeth 135 leave indentations on the surface of the pole piece, specifically, the pits and the protrusions generated on the pole piece after embossing increase the friction force, reduce the relative displacement caused by the slipping of the pole piece during winding, and increase the layer spacing of the bare cell to make the angle between the two pole lugs after winding and the circle center of the winding needle smaller, so that the pole lugs are not biased to one direction, and the alignment degree is better. The diameter-variable winding needle 173 can adjust the diameter of the winding needle in a small range, so that the deviation of the tail position of the battery cell and the layer number of the battery cell, which is influenced by the change of the diameter size of the winding needle caused by processing errors, is eliminated. The embossing roller produces pit, arch on the cathode plate, and electric core position deviation when the coiling was adjusted to reducing book needle 173, has also increased the surface area when increasing the interval between the layer of naked electric core, has improved electric core quality.
Second embodiment
The present embodiment provides a winding machine, which comprises a frame, a sheet feeding mechanism and a pole piece winding correction device 100, wherein the basic structure and principle of the pole piece winding correction device 100 and the generated technical effect are the same as those of the first embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the first embodiment for parts not mentioned in the present embodiment.
In this embodiment, the pole piece winding correction device 100 includes a mounting plate 110, an embossing roller set 130, an intermediate roller set 150, a winding mechanism 170 and a feeding roller set 190, the embossing roller set 130, the intermediate roller set 150 and the winding mechanism 170 are all disposed on the mounting plate 110, the embossing roller set 130 is used for embossing the pole piece and leaving an indentation on the pole piece, the winding mechanism 170 is used for winding the pole piece with the indentation, and the intermediate roller set 150 is disposed between the embossing roller set 130 and the winding mechanism 170 and is used for feeding the embossed pole piece into the winding mechanism 170. The set of feed rollers 190 is disposed on the mounting plate 110 and is located on the feed side of the winding mechanism 170. The mounting plate 110 is fixed on the frame, and the sheet feeding mechanism is arranged on the mounting plate 110 and used for feeding the pole pieces.
It should be noted that, in the present embodiment, a driving mechanism for driving the pole piece to move is further disposed on the mounting plate 110, and the driving roller can be used to drive the pole piece to move.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. The pole piece winding correction device is characterized by comprising a mounting plate, an embossing roller set, a middle roller set and a winding mechanism, wherein the embossing roller set, the middle roller set and the winding mechanism are all arranged on the mounting plate, the embossing roller set is used for embossing a pole piece and leaving an indentation on the pole piece, the winding mechanism is used for winding the pole piece with the indentation, and the middle roller set is arranged between the embossing roller set and the winding mechanism and is used for feeding the embossed pole piece into the winding mechanism.
2. The pole piece winding correction device of claim 1, wherein the embossing roller set comprises an embossing roller and a glue roller which are oppositely arranged on the mounting plate, an embossing channel for the pole piece to pass through is formed between the embossing roller and the glue roller, and embossing teeth are arranged on the outer peripheral surface of the embossing roller and are used for pressing the pole piece and leaving an impression on the pole piece.
3. The pole piece winding correction device of claim 2, wherein the embossing teeth comprise a plurality of embossing lobes, each embossing lobe having a semi-circular cross-section.
4. The pole piece winding correction device of claim 3, wherein the plurality of embossed protrusions are hemispherical protrusions and are uniformly distributed on the outer circumferential surface of the embossing roller.
5. The pole piece winding correction device of claim 1, wherein the winding mechanism comprises a winding head and a reducing winding needle, the winding head is arranged on the mounting plate, the reducing winding needle is rotatably arranged on the winding head, the reducing winding needle is used for winding the pole piece, and the winding diameter can be adjusted according to the alignment degree of the pole piece.
6. The pole piece winding correction device of claim 5, wherein the number of the reducing winding needles is two, and the two reducing winding needles are oppositely arranged on the winding head.
7. The pole piece winding correction device of claim 1, further comprising a feed roller set disposed on the mounting plate and located on the feed side of the winding mechanism.
8. The pole piece winding correction device of claim 1, wherein the middle roller group comprises a first roller, a second roller, a third roller and a fourth roller, the first roller and the fourth roller are arranged along a first straight line direction, the second roller and the third roller are arranged along a second straight line direction, the first straight line direction and the second straight line direction are parallel to each other, the first roller and the second roller are respectively used for being arranged on two sides of the pole piece, and the third roller and the fourth roller are respectively used for being arranged on two sides of the pole piece.
9. A winding machine comprising a sheet feeding mechanism and a pole piece winding correction device as claimed in any one of claims 1 to 8, said sheet feeding mechanism being provided on said mounting plate for feeding said embossing roller set.
CN202120678196.5U 2021-03-31 2021-03-31 Pole piece winding correction device and winding machine Active CN214378574U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120678196.5U CN214378574U (en) 2021-03-31 2021-03-31 Pole piece winding correction device and winding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120678196.5U CN214378574U (en) 2021-03-31 2021-03-31 Pole piece winding correction device and winding machine

Publications (1)

Publication Number Publication Date
CN214378574U true CN214378574U (en) 2021-10-08

Family

ID=77973955

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120678196.5U Active CN214378574U (en) 2021-03-31 2021-03-31 Pole piece winding correction device and winding machine

Country Status (1)

Country Link
CN (1) CN214378574U (en)

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